{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,19]],"date-time":"2026-01-19T13:33:51Z","timestamp":1768829631315,"version":"3.49.0"},"reference-count":14,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2005,11,25]],"date-time":"2005-11-25T00:00:00Z","timestamp":1132876800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Ultrasound in Obstet &amp; Gyne"],"published-print":{"date-parts":[[2005,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>To assess the value of a single cervical length measurement by transvaginal sonography (TVS) at the time of mid\u2010trimester anomaly scan for predicting spontaneous preterm delivery (SPD) among Chinese women.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A prospective observational study was carried out involving 2880 subjects with singleton pregnancies and confirmed gestational age. Cervical length was measured at 18\u201322 weeks of gestation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The incidence of SPD &lt; 34 weeks and &lt; 37 weeks were 0.7% and 3.7%, respectively. Women with SPD &lt; 34 weeks and SPD &lt; 37 weeks had shorter median cervical lengths (32.6 mm and 36.2 mm, respectively) than those with term deliveries (37.6 mm) (<jats:italic>P<\/jats:italic> = 0.006 and 0.025, respectively). The predictive performance of cervical length was better for SPD &lt; 34 weeks compared with &lt; 37 weeks. A cervical length \u2264 27 mm, which corresponded to the 4<jats:sup>th<\/jats:sup> centile, occurred in 36.8%, 62.5% and 100% of those with SPD &lt; 34, &lt; 30 and &lt; 26 weeks, respectively. The positive likelihood ratio (LR) of a cervical length \u2264 27 mm in predicting SPD &lt; 34 weeks was 9.8. Using logistic regression, both short cervix and funneling were independent predictors for SPD &lt; 34 weeks of gestation. The coexistence of funneling and a cervical length \u2264 27 mm gave a positive predictive value (PPV) and LR of SPD &lt; 34 weeks of 14.7% and 26.0, respectively.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Mid\u2010trimester cervical length is predictive of SPD in Chinese women. However, given the low PPV of a short cervical length, its clinical utility is still limited in low\u2010risk populations. Copyright \u00a9 2005 ISUOG. Published by John Wiley &amp; Sons, Ltd.<\/jats:p><\/jats:sec>","DOI":"10.1002\/uog.2617","type":"journal-article","created":{"date-parts":[[2005,11,25]],"date-time":"2005-11-25T11:49:26Z","timestamp":1132919366000},"page":"713-717","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":41,"title":["Cervical length at 18\u201322 weeks of gestation for prediction of spontaneous preterm delivery in Hong Kong Chinese women"],"prefix":"10.1002","volume":"26","author":[{"given":"T. N.","family":"Leung","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. W.","family":"Pang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"T. Y.","family":"Leung","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C. 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